短语词组短語frictional deflection angle 摩擦偏角internal frictional angle 內摩擦角;內磨擦角inner -frictional angle 內摩擦角frictional angle WESTBANK 摩擦角inner frictional angle 內摩擦角residual frictional angle 殘餘摩擦角 返回 frictional angle